Grinding machinery.



J. MORAT. GRINDING MACHINERY. APPLICATION FILED NOV. 13, 1910.

Patented Sept. 8, 1914.

2 SHEETS-SHEET 1.

THE NO QI PETERS CO.. PHOTO-LITHCL, WASHINGTON. D, 2

J- MORAT.

GRINDING MACHINERY.

APPLICATION FILED 110mm, 1910.

Patented Sept. 8,191L

2 SHEETS-SHEET L DSTAIE PATENT OFFICE-5;

\ ,TAcQUEs Mortar, or wanna, NEW YORK. 1

; GRINDING MACHINERY.--

,To all whom it maj concem:

,Beft known that I, JAOQ' v MoRA'r, a citizen of the Republic of France, residin'gat Yonkers, in the county of. Westchester and State of New Yorlghave invented certain new and useful Improvements Grinding Machinery, of which the following is a specification.

My invention relates to an improvement. 1n grinding machinery, whether adapted to be used for grinding sand, rock, chemicals,

etc., and it pertainsinore particularly tothe pan and roller type of machine, consisting as a rule of av circular panrev olving under two rollers means of gearjand lshaft mechanism. In thls general typeof machines, the various substances constituting the mlxture arethrown. into thev pan while the machine lsinoperation and after lthas' the pans with removable plates for the bot toms of the pans, in order to save the pans, and the rollers themselves have been provided with detachable rims; moreover the detachable rims and removable plates have beenmade of hard iron or steel, such as manganese steel. But all instances, the abrading surfaces wear away sooner or later, as will be more fully explained hereinafter, and likewise the hubs of the rollers wear, so that the rollersthemselves, instead of continuing vertical or nearly so, dip toward the center of the machine, thus wearingthe bottom plates still further at one point.

When the rollers and plates wear in such shape, thesand cannot be mixed and ground properly, because there are only a fewpoints of contact between rollers and plates, and

besides there is not enough-of the sliding,

horizontal motion between rollers, and plates which is most desirable to HllX and rub the various ingredients composing the mixture, ,in order to produce the best quality of sand,

especially for foundry purposes.

lheobject of my present invention is to.

reduce expense due to" the replacement of worn-out parts,andto produce a better and more un fornrquality of product, such as With these several objectsiin view,

Patented Sept. 3, 1914. I j Applicati on filed November 18,1910. ser lrro'isaaosa i .vention'consistsin rollers, andplateshaving recesses thereinfadapted to receive an itCCUlllUliLtlOIlOf isand wh ch becomes compact and hard, automatically renewing and replacing the wear "on, the sandhlthus in- I creasing the eiiic ency 'of these parts, and

thus greatly prolonging their life.

Myfinventionfurther consists in certain novelfeatures of construction'and combina' tions of parts, [which will be hereinafter fully described and pointed out in the claims.

p In the accompanying drawingszFigurel is aview in 'side elevation showing the type of a grindinginachine now commonly. in, use, with dotted lines indlcatlngthe wear commonly takes place on the peripheries of therollers, and in the bottoms of the pans, I -Fig..2is a similar view of my improved ma-.

chine, Fig; 3is an end view of oneof the r rollers, {Fig 4: islatransverse verticalseo tion through thesame, Fig. 5 isa plan view of the pan, showing several of the removable plates in ,the bottom thereof, Fig. 6

shows a modified form of plate having ,grooves nstead of holes, F1g. 7 1s a cross a section through this modified form of plate,

and Figs; 8. and 9 are similar sectional views showing other forms that can be g ven the holes or grooves.

In the construction illustrated in I I have, attempted to. illustrate the wear which takes place insthe machine of this character now; n general, use. In almost every instance, the wear to the rollers takes place as shown in dotted lines in i-WV,

andthe wear to the removable plates B, B,

occurs somewhat as'shown in dotted lines ,V.'V. The hubs of the rollers wear so that the latter instead of running vertically or "nearly, so, dip toward the center of the mechine,.l wearing the; bottoms of the plates ,B,1B,;still further-toward the center as also illustrated by the dotted lines In, the machine used to illustrate mylinvention, a verticalshaft 1 isstepped at2o n ice the baseB oftheframe. I This shaft carries the pan 4:. The shaft 1 is supported by'a beam 5, surmounting the, pillars or uprights 6, 6; Thedrive shaft T is journaled inboXes 8 8 on the beam 5, and gears 9, and 10 transmit, motion fronithe horizontal drive shaft]? to the vertical shaft 1. Rollers 11,

11, havetheir hubs12, 12, journaled in bea-r- 'ingsj13,18, on the inner faces of the pillars I pr ht Referring now to the pan 4;, more particularly the removable plates 14:, 1a,

which form the bottom thereof, these are of the usual segmental form, as shownin Fig. 5, and are conveniently held in place by screws 15,15. These plates are'provided with holes 16, 16, and grooves 17, 17, as illustrated in Figs. 5, 6, and 7 and different forms which these holes and grooves may take are illustrated in Figs. 7, 8 and 9. The rims of the rollers are circumferentially grooved as at 18, 18, and the transverse shape of these grooves might vary likewise, as illustrated in Figs. 7, 8, and 9, the object of'thesegroovesinf the rollers and the holes in the plates being that they retain the sand as illustrated. The sandused in foundries has a certain strength, and it willsticki so hard inthese grooves and holes that it becomes almost ashard asa rock, and forms thereby a roller or plate, the wearing sur-' face of which is mostly sand, and itis plainly seen that in a roller or plate so constructed, the portions which will tend to wear most are the projecting ridges or points of sand, which cost nothing and renew themselves indefinitely. "In other .words, the advantages of such roller and pan-plate construction are :less wear, consequently less expense in renewing worn-out parts, and less time lost as a result of shutting down the sand grinders for repairs. The quality of the work is more uniform with these rollers than with the old style, because the original working conditions are preserved for a much longer period; and where porosity of the sand is advantageous, these rollers and plates will give better results because they do not crush the sand so fine. If the holes or corrugations are made close together, instead of ridges of sand, the whole surface will knit together, and the entire wearing surface could be made of sand.

this is not an essential feature in every instance, as the weight of the roller must be proportioned to its width, and the kind of grinding to be done. I prefer to core out the roller because it affords an opportunity of balancing the roller so that under 0rdinary working conditions, it will remain straight or nearly so, preserving thereby the original working condition of the new ma chine.

but I have likewise found that the hubs of my rollers were the weakest point, and

The side 21 being thicker than the side 22, the weight on the side 21 will be,

tended to wear out long before the face. Consequently I provide the rollers with removable hard steel bushings 23, held fast by means'of babbitt or spelter filling24 cast between the hub of the roller and the bushing. Thus the worn-out bushing may be readily removed by heating it with a torch sufficiently to melt the spelter, and the bush ing can be replaced by a new one.

I am aware that some grinding pans are not, or cannot be equipped with removable plates. In this case,I make the inside or bottoms of the pans themselves with holes or grooves so as to obtain the same results as with the removable plates. Also some machines might employ one of my rollers in connection with a plain roller of the old type. f a I do not care to confine myself to the use of rollers and detachable pan-plates for ffoundry purposes only, as the same principle would apply'equally to any grinding machinery whatever, whether it is used for grindingsand, rock, chemicals, or what not.

It is also evident that more or less slight changes might be resorted to in the form and arrangement of the several parts described without departure from the spirit and scope of my invention, and hence I do not wish to be limited to the exact construction herein set. forth, but

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is z- 1. A grinding-machine comprising a pan and a roller mounted to work in connection with said pan insuch a manner that a sliding horizontal motion takes place between the two,and said roller provided with circumferential grooves in'which the material being ground is packed and held.

2. A grinding-machine comprising a grinding face having recesses therein, and

l a rotary grinding member mounted to have As shown 1n Fig. 4, my preferred form of roller 1s cored out inside as at 20, althoughsliding horizontal motion over said grinding face and provided with circumferential grooves in its working face, said recesses and grooves formed and disposed to receive and hold the material being ground.

3; A grinding-machine comprising a pan and a roller mounted in such a manner that in its passage over the pan a sliding horizontal grinding motion takes place between the two, said pan having recesses in the face thereof, and grooves formed circumferformed circumferentially around the roller, 13o

said recesses and grooves so formed that the material being ground is receivedand held therein to form a grinding surface, and means for transmitting movement to one of said grinding members, whereby the roller will be caused to come in contact with the pan.

5. A grinding machine, comprising a pan mounted to be capable of rotation, a roller revolubly mounted adjacent the pan and at right angles to the axisof rotation of the pan, said pan having recesses in the face thereof, grooves formed circumferentially in the roller, said recesses and grooves constructed to receive and hold the material being ground for forming a grinding surface, and means for rotating the pan, which, through the engagement of the material being treated with the roller, causes the roller to revolve and transmits a sliding horizontal grinding motion to the material in the pan.

6. A grinding machine, comprising a pan mounted to be capable of rotation, rollers revolubly mounted adjacent the pan and at right angles to the axis of rotation of the pan, said pan having recesses in the face thereof, grooves formed circuinferentially 1n the rollers,-sa1d recesses and groovesconstructed to receive and hold the material,

beingground for forming a grlnding sur face, and means for rotating the pan,ywhich,

through the engagement of the material being treated'with the rollers, causes the rollers to revolve andtransmits a sliding hori zontal gr nding motion to the material in the pan, said rollers made heavier ontheir one side, so that they will hear more evenly I against the working face of the pan.

In testimony whereof I aflix my signature,

in the presence of two witnesses.

ACQUES MORAT. Witnesses:

F. WVALTER BLACKEBY, ELIAS M. JOH SON."

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of r'atents,

Washington,D.-G. I 

